Sloppity Bilepiper [Warhammer 40,000]

Cost: 3 B Jolly Gutpipes — 2 , T , Sacrifice a creature: The next creature spell you cast this turn has cascade. (When you cast your next creature spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.)